Service manual

XL-MP150
6 – 1
AudioXL-MP150Service ManualXLMP150MarketE
CHAPTER 6. CIRCUIT SCHEMATICS AND PARTS LAYOUT
[1] NOTES ON SCHEMATIC DIAGRAM
•Resistor:
To differentiate the units of resistors, such symbol as K and M are
used: the symbol K means 1000 ohm and the symbol M means
1000 kohm and the resistor without any symbol is ohm-type resis-
tor. Besides, the one with “Fusible” is a fuse type.
• Capacitor:
To indicate the unit of capacitor, a symbol P is used: this symbol P
means pico-farad and the unit of the capacitor without such a sym-
bol is microfarad. As to electrolytic capacitor, the expression
“capacitance/withstand voltage” is used.
(CH), (TH), (RH), (UJ): Temperature compensation
(ML): Mylar type
(P.P.): Polypropylene type
• Schematic diagram and Wiring Side of P.W.Board for this model
are subject to change for improvement without prior notice.
• The indicated voltage in each section is the one measured by Digi-
tal Multimeter between such a section and the chassis with no sig-
nal given.
1. In the tuner section,
indicates AM
indicates FM stereo
2. In the main section, a tape is being played back.
3. In the deck section, a tape is being played back.
4. In the power section, a tape is being played back.
5. In the CD section, the CD is stopped.
• Parts marked with “ ” ( ) are important for
maintaining the safety of the set. Be sure to replace these parts
with specified ones for maintaining the safety and performance of
the set.
[2] TYPES OF TRANSISTOR AND LED
REF. NO DESCRIPTION POSITION
SW1 CLAMP ON—OFF
SW1A PICKUP IN ON—OFF
SW2 TRAY SW1 ON—OFF
SW3 TRAY SW2 ON—OFF
SW4 DISC ON—OFF
SW701 POWER ON/STAND-BY ON—OFF
SW702 CLOCK/TIMER ON—OFF
SW703 REC/PAUSE ON—OFF
SW704 PRESET UP ON—OFF
SW705 PRESET DOWN ON—OFF
SW706 REVERSE PLAY ON—OFF
SW707 REVERSE MODE ON—OFF
SW711 VIDEO/AUX ON—OFF
SW712 TUNER (BAND) ON—OFF
SW713 PLAY/REPEAT ON—OFF
SW714 TUNING/TIME DOWN ON—OFF
SW715 TUNING/TIME UP ON—OFF
SW716 STOP ON—OFF
SW717 CD ON—OFF
SW718 TAPE ON—OFF
SW719 MEMORY/SET ON—OFF
SW720 EQUALIZER ON—OFF
SW721 X-BASS/DEMO ON—OFF
SW722 DIRECT PLAY ON—OFF
SW723 DISC 1 ON—OFF
SW724 DISC 2 ON—OFF
SW725 DISC 3 ON—OFF
SW726 DISC 4 ON—OFF
SW727 DISC 5 ON—OFF
SW728 OPEN/CLOSE ON—OFF
REF. NO DESCRIPTION POSITION
(1) (2) (3)
(S) (G) (D)
EC B
FRONT
VIEW
KTA1271 Y
KTA1273 Y
KTA1274 Y
KTC3199 GR
KTC3200 GR
SVC347S
SVC230C
FRONT
VIEW
KTC3203 Y
KTC3194 Y
KTC2026
KTC3205 Y
TOP
VIEW
KTA1504 Y
KTA1504 GR
KTC3875 GR
KRA102 S
KRA107 S
KRC104 S
KRC102 C
B
(3)
C
(2)
E
(1)